A couple of other ‘life hacks’ I’ve utilized with good success…

If you’re using a water bottle of this nature during a day hike or some other adventure: fill half way, then lay in the freezer on its side so the water freezes “vertically”, then come morning fill the other side with water, and you’ll have cool ice water all day long.

Also – for cooler nights camping, if you’re looking for a little extra warmth, fill up a Nalgene bottle with boiling water, toss it in the sleeping bag, and it’ll help keep things toasty through the night.

Most probably know these, but thought I’d toss them out there.

cheers!